Spray Dryer

A spray dryer is a device used in various industries to transform a liquid into powdered form. It accomplishes this by spraying the liquid feed into a hot gas stream, where the droplets rapidly dry and solidify, resulting in fine, powdered particles. Spray drying is a common method for producing powders from a wide range of materials, including food products,  chemicals, and more.

Spray dryer working principles：

1.Liquid Feed: The process begins with a liquid feed that needs to be dried. This feed can be a solution, suspension, emulsion, or even a paste, depending on the specific application.

2.Atomization: The liquid feed is atomized into fine droplets. This is typically achieved using a high-pressure nozzle or rotary atomizer. The goal is to create a large surface area for the liquid to interact with the hot gas.

3.Drying Chamber: The atomized droplets enter a drying chamber, which is usually a large, cylindrical chamber with hot air or gas flowing through it. The heat source evaporates the liquid from the droplets, leaving behind solid particles.

4.Particle Separation: The dried particles are carried along with the hot gas stream toward the outlet of the dryer. In most cases, the hot gas and particles are separated using a cyclone separator, bag filter, or other separation equipment. The separated dried particles are collected, while the hot gas is typically recirculated or released into the atmosphere.

5.Product Collection: The dried powder is collected in a receptacle or container for further processing, packaging, or storage.

Applications：

1.Food products: Such as powdered milk, coffee, and instant soups.

2.Pharmaceuticals: For the production of drug formulations and excipients.

3.Chemicals: Including dyes, pigments, and catalysts.

4.Ceramics: For manufacturing ceramic powders.

5.Polymers: To create polymer powders for various applications.